0452981 - ÚFP 2016 RIV US eng C - Conference Paper (international conference)
Doleček, Roman - Psota, Pavel - Lédl, Vít - Vít, Tomáš - Dančová, P. - Kopecký, V.
Comparison of digital holographic interferometry and constant temperature anemometry for measurement of temperature field in fluid.
Proceedings of SPIE Vol. 9508: Holography: Advances and Modern Trends IV. Vol. 9508. Bellingham: SPIE-INT SOC OPTICAL ENGINEERING, 2015 - (Hrabovsky, M.; Sheridan, J.; Fimia, A.), 95080P-95080P. SPIE. ISBN 978-1-62841-629-9. ISSN 0277-786X.
[Conference on Holography - Advances and Modern Trends IV. Prague (CZ), 15.04.2015-16.04.2015]
R&D Projects: GA ČR(CZ) GA14-32228S
Institutional support: RVO:61389021
Keywords : digital holography * holographic interferometry * temperature measurement * tomography
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Result website:
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2293344DOI: https://doi.org/10.1117/12.2185056

The presented paper shows possibility of using digital holographic interferometry (DHI) for temperature field measurement in moving fluids. This method uses a modified Twymann-Green setup having double sensitivity instead of commonly used Mach-Zehnder type of interferometer in order to obtain sufficient phases change of the field. On the other hand this setup is not light efficient as Mach-Zehnder interferometer. For measurement of the fast periodical phenomenon is not necessary to use always the high speed camera. One can consider this field to coherent phenomenon. With employing one digital camera synchronized to periodic field and external triggered one can capture whole period of the phenomenon. However the projections form one viewing direction of asymmetrical temperature field maybe misguided. Hence for sufficient examination of the asymmetrical field one should capture a large number of the phenomenon’s projections from different viewing directions.
Permanent Link: http://hdl.handle.net/11104/0253857